It's high time to recheck FreeBSD project and to show that even in such serious and qualitative projects PVS-Studio easily finds errors. This time I decided to take a look at the analysis process in terms of detecting potential vulnerabilities. PVS-Studio has always been able to identify defects that could potentially be used for a hacker attack. However, we haven't focused on this aspect of the analyzer and described the errors as typos, consequences of sloppy Copy-Paste and so on, but have never classified them according to CWE, for example. Nowadays it is very popular to speak about security and vulnerabilities that's why I will try to broaden at the perception of our analyzer. PVS-Studio helps not only to search for bugs, but it is also a tool that improves the code security.